là 4 nguyên tử Hidro và 1 nguyên tử Cacbon

nếu ko biết gì về hóa thì nhắn tin mình mình chỉ cho nha 

lại 1 ng get 

do rat be de nen tui ghet

môn gì v bn 

môn hóa à

=10+90=100 

k nka 

Câu trả lời là:

 60+30+10=100

  Đáp số: 100

tích nha

Câu trả lời là:

 90x2=180

  Đ/s;......................

**** mha

90.2 =180

Câu trả lời là:

 4+5= 9

  Đáp số: 9

Tổng là:

   4 + 5 = 9

       Đáp số:9

la 108

ban nhe

tk nhe@@@@@@@@@@@@@@@

bye

Số lớn nhất có hai chữ số khác nhau là: 98

Số nhỏ nhất có hai chữ số là: 10

Tổng của số lớn nhất có hai chữ số khác nhau và số nhỏ nhất có hai chữ số là:

98 + 10 = 108

Đáp số: 108

Tổng là:

    5 + 5 = 10

          Đáp số:10

5+5=10

17 k nha

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Tổng là:

   12 + 5 = 17

         Đáp số:17